Help please
I don’t know what it is and I need to find the value of x please HELP

A) if $50000 is invested in a bank account that pays 9.3% of interest compounded on a six-monthly basis, how much money will be in the account after 3 and 12 years? b) if matusalen's father had put $2.0 in the bank when he was born and there, how long would matusalen have had to his death (969 years later) if the interest was 7% per year composed each month and weekly?

What is the ratio of the length of an object in yards to the length of the same object in miles?

With number 11 ( show how you got the answer)